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(No Model.) a SheetsSheet I. HENRY A. HOUSE & HENRY A. HOUSE, Jr.

SAND BLAST APPARATUS.

N0. 391,971. Patented Oct. 30, 1888.

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3 Sheets-Sheet 2.

(No Model.)

HENRY A. HOUSE & HENRY A. HOUSE, Jr.

SAND BLAST APPARATUS.

Patented Oct. 30, 1888.

N. PETERS. PhnlmLlHwgmphcr, wasln tun, D. C.

(No Model.) 3 Sheets-Sheet 3A HENRY A. HOUSE & HENRY A. HOUSE, Jr.

SAND BLAST APPARATUS. No. 391,971. Patented Oct. 80, 1888.

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UNITED STATES PATENT .FFlClEQ HENRY A. HOUSE AND HENRY A. HOUSE, JR, OFBRIDGEPORT, CONNEC- TIOUT, ASSIGNORS OF ONE-THIRD .TO E. EMMONS GRAVES,OF SAME PLACE.

SAN D- BLAST APPARATUS.

SPECIFICATION forming part of Letters Patent No. 391,971, dated October30, 1888.

Application filed June 1, 1887. Serial Nofillljfi'l. lN'omodel.)

To all whom it may concern.-

Be it known that we, HENRY A. IIOUSE and HENRY A. HoUsE, Jn, citizens ofthe United States, residing at Bridgeport, in the county of 5 Fairfieldand State of Connecticut, have invented certain new and usefulImprovements in Sand-Blast Apparatus; and we do hereby declare thefollowing to be a full, clear, and exact description of theinvention,such as will enable others skilled in the art to whichitappertains to make'and use the same.

Our invention relates to machines for finishing the surface of wood,metal, or other substances by the use of sand, and has for its object toaccomplish the resultautomatically and by means wholly mechanical, andto do away entirely with the use of air'ourrents or steam in propellingthe sand; and with these ends in view our invention consists in thedetails of 2c construction hereinafter fully explained, and

then recited inthe claim.

In order that those skilled in the art to which our invention appertainsmay more fully understand how to make and use the same, we

2 5 will describe the same in detail, referring by letter to theaccompanying drawings, which form a part of this -specihcation,andinwhich- Figure 1 shows a side elevation of our im provement, the casingbeing sectioned; Fig.

0 2, a detail sectional elevation of the propelling-wheel and the druminclosing the same; Fig. 3, an end elevation, the case being sectioned,as at Fig. 1; and Fig. 4, a detail vertical section of thepropelling-wheel.

Similar letters denote like parts in all the figures of the drawings.

A is a casing which incloses all the working parts of our machine, and Bis a vertical shaft journaled within said casing. Rigidly 40 secured tothis shaft is a balance-wheel, G, of

sufficient diameter and weight to secure uniformity of motion.

D are blades having T-headed shanks E, which are secured within agroove, F, in the 5 periphery of the wheel 0 by means of pins G, asshown at Fig. l. The wheel and blades are incased within a drum, H,which latter has a mouth, I, substantially tangential to said wheel.Near the lower end of the shaft is secured a small band pulley, J, bywhich motion is transmitted from the driving-pulley K through the belt Lto the shaft B.

Q is a shaft carrying a roll, R. S is another roll mounted on shaft T atthe bottom of the casing. The two rolls and shafts last described 1 arecaused to revolve by power derived from any suitable source-as, forinstance, aseparate counter-shaft, which we have not thought itnecessary to show. Over the rolls R S is an endless belt, U, havingsecured thereto at intervals the buckets V, which carry the sand.

W is a chute, within which the sand elevated by the buckets isdeposited, and X is a hopper wherein the sand flows from the chute. Theoutlet of this hopper is through the drum H in a line with the mouththereof and within the field of operation of the blades D, as indicatedby the dotted line a at Fig. 2, so that it will be readily understoodthat when the wheel O is rapidly revolved the blades will strike thestream of sand and throw the same with great violence out of the mouthI.

The article to be operated upon is within the field of the propelledsand, as shown at Y, and may of course be manipulated or mounted 7 on asuitable arbor in any well-known or desirable manner.

In order that the sand which has become too fine by reason of toofrequent use may be separatedfrom the coarser particles, we provide aninclined sieve, Z, immediately below the mouth of the drum, so that thesand after it has been driven against the article to be operated uponwill fall on the sieve, the fine particles sifting through the same andaccu- 8 mulating at the bottom of the casing, whence they may beshoveled away, and the coarser particles flowing down and emptyingwithin the field of operation of the buckets. Of course sieves ofvarious degrees of fineness may be 0 used as the case may demand.

Leading from the top of the casing is a fine, A, in which 'revolves afan, 13, mounted on the upper end of the shaft B, the object of the saidfan being to create a draft to carry away 9 5 all the dust arising fromthe use of the sand.

Having thus described our invention, we claim- A sand-propellingapparatus consisting of the following instrumentalities and parts,namely: the wheel 0, mounted on the vertical shaft B, journaled withinthe casing A, the

5 blades D, secured to the periphery of said Wheel, the drum H, incasingsaid wheel and having a mouth tangential thereto, the hopper X, securedto the top of said drum in a vertical plane with the mouth thereof, the

10 chute W, adapted to deposit the sand within the hopper, the endlessbelt U, carried by rolls R S and having buckets adapted to scoop thesand and deposit it in said chute, the sieve Z, attached to the casingimmediately below 15 the mouth of the drum and extended at an inclinetoward the bottom of the casing and in close proximity to thesand-elevating mechanism, and the exhaust-fan B, mounted on the upperend of the shaft B and adapted to revolve within a flue, A, which latterextends 20 from within the casing, substantially as set forth.

In testimony whereof we affix our signatures in presence of twowitnesses.

HENRY A. HOUSE. HENRY A. HOUSE, JR.

\Vitnesses:

S. H. HUBBARD, S. S. \VILLIAMSON.

